A study of the solubility parameter δ 2 was pursed in order to obtain further information on the prominent molecular factors affecting its value. The details of the expressions derived for the components of δ 2 depends on the considerable usage of both classical statistical thermodynamics and the well‐know equations for intermolecular forces. The results confirm that relatively simple expressions for the components of δ 2 are found. The disperson component of the solubility parameter, δ 2 d , is a function of the molecular polarizability, fractional polarity, molar volume, and van der Waals volume. The polar component of the solubility parameter, δ 2 p , is a function of the dipole moment, temperature, molar volume, and van der Waals volume; δ 2 d is found to increase linearily with molecular size, while δ 2 p is found to decrease with molecular size (except at low molecular volumes). As will be shown, the expressions derived here have considerable utility in elucidating results obtained by other researchers.
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Dennis G. Peiffer (1980) studied this question.
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